Principle of Inheritance and VariationHard

Question

Multiple alleles control inheritance of

Options

A.phenylketonuria
B.colourblindness
C.sickle cell anaemia
D.blood groups

Solution

Multiple alleles control inheritance of blood groups in human A, B, O blood group system is found in humans where the allele IA for A antigen is codominant with the allele IB for the B antigen.
Both IA and IB are completely dominant to the allele IO
Hierarchy of dominace relationships is symbolized as (IA = IB) > IO

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